Rotary engine



Nov. 24,1925. 1,562,743

A. w. DAw ET AL ROTARY ENGINE Filed July 5. 1924 2 Sheets-Sheet 1 3 50 v, 4 I: ll J 55 1 v 52 53 57 q 5/ summons A. w. mw

Z. W. DAW

Nov. 24,1925. 1,562,743

A. W. DAW H AL ROTARY ENGINE Filed July 5. 1924 2 Sheets-Sheet: 2

INVENTORS W. DAW

z. mw By their AttymM-(" Patented Nov. 24, 1925.

ED ST AT'ES PATENT OFFICE.

ALBERT WILLIAMS DAW AND ZACHABIAS WILLIAMS DAW, OF LONDON, ENGLAND.

ROTARY ENGINE.

Application filed July 3,

To o w/iom it may concern Be it litnown that we, Annnnr \Vinmnns lliw and f'iicinn. ll lLLIAMS DAw, subjects of the King Great Britain, residing at ll Queen Victoria Street, London, England, have invented new and useful Iniprovcnients in or Relating to Rotary Engines, of which the following is a spccili cation.

"his invention relates to improvements in rotary engines, such as are described in our (re-pending application Serial No. 466,457, such engines comprising an outer cylinder or drum having mounted eccentrically within it, by means of a crank shaft or its equivalent, an inner cylinder or drum of sn'iallcr diameter connected thereto, so that the action of the one controlled by the other.

in the engine described in this co-pending application, a piston is fixed to a main cylinder and rei'ziprocates and oscillates in an inner cylinder.

e have found that in an engine constructed in this manner, if the stroke be such that the inner end of the piston comes be yond the centre of the cylindrical segments of the rocker which forms a bearing for the piston, the inner faces of the cylindrical segments are apt to approach one another, with the result that on the return stroke, jamming action takes place'between the rocking segments and the piston and consequently the stroke is limited thereby.

The main object of the present invention is to provide an arrangement which enables the stroke of the vane to be increased without introducing this tendency to jam.

According to the present invention, each end of the piston provided with a projection which is of such length that when the piston is at the end of its out stroke it does not reach the centre of the cylindrical se ments of the rocker, wnile at the end of its iii-stroke the projections come in. close proximity to the crank shaft. The end plates at the ends of the inner cylinder are provided with slots within which the projections on the piston can reciprocate and oscillate.

In the accompanying drawings which show how our invention can be carried into effect, Figure 1 is a sectional elevation, and Figure 2 is a sectional perspective View of the engine with the piston in one extren'ie position, and Figures 3 and i. are similar 1924. Serial No. 723,979.

views showing the piston in the other treme position. Figure 5 is a perspective view of the piston.

l is a main or outer cylinder, 3 an inner cylinder; 4- are vanes which form means for obtaining a tight joint between the cylinder: 1 and 3.

let the cranked part of the shaft on which the inner cylinder 3 is mounted. is the boss at the end of the cylinder l1. are cylindrical segments forming a rocking hearing or rocker.

The parts thus far described are the same as those described in our co-pending appli* cation No. 466,457.

51 is a piston fixed to the outer cylinder 1, as in the co-pending application referred to. are projections formed at each end of the piston. 53 is an end plate secured to the inner cylinder 3 by screws 54:. The end plate is provided with a recess 57 in which the projecting end 52 of the piston can oscillate and reciprocate. is a recess in the inner cylinder 3 to allow that part of the piston located between the projections 52 to oscillate and reciprocate.

It will be seen that the end plate 53 is of such thickness that after the recess has been cut therein, a thickness of metal 58 is left.

57 is a packing ring.

The end plates 53 serve to prevent longitudinal movement of the vanes 4.

In operation, the projecting ends 52 of the piston do not reach the centre of the segments 11 of the rocker on its out-stroke, and consequently the tendency of the inner faces of the said segments to come together and jam is eliminated, while on the in-stroke the ends 52 come nearly up to the crank shaft so that the stroke can be made considerably longer.

It may be also be pointed out that the projecting ends 52 in their inmost position almost reach the cranked part 14 of the shaft, and also that that part of the piston located between the projecting parts 52 also closely approaches the boss 50 of the inner cylinder 3.

What we claim is 1. In a rotary engine of the crescent chamber type, in which two cylinders are connected together so that the action of the one is controlled by the other, the combination of a piston, radial projections at the ends of the piston, a rocking bearing in which ill) the piston and piston projections slide, end plates, and slots in the end plates in which the said projections reciprocate and oscillate.

2.111 a rotary engine of the crescent chamber type, in which two cylinders are connected together so that the action of the one is controlled by the other, the coinhination of a piston, radial projections at the ends of the piston, a pair of cylindrical segmei'its comprising a rocking bearing in which the piston ,and piston projections slide, end plates, and slots in the end plates in which the said projections reciprocate and oscillate.

3.111 a rotary engine of the crescent chamber type, in which two cylinders are connected together so that the action of the one is controlled by the other, the coinhinm tion of a piston, radial projections at the ends of the piston, a rocking bearing in which the piston and piston projections slide, end plates, and slots in the end plates extending partly therethrough at their inner ends in which the said projections recipro- Cate and oscillate.

at. In a rotary engine of the crescent chamber type, in which two cylinders are connected together so that the action of the one is controlled by the other, the combination of a piston, radial projections at the ends of the piston, a pair of cylindrical nients comprising a rocking bearing in which the piston and piston projections slide, end plates, and slots in the end plates extending partly therethroiigh at their inner ends in which the said projections reciprocate and oscillate.

In testimony that we claim the foregoing as our invention we have signed our names this 12th day of June, 1924.

ALBERT "WILLIAMS DAlV. ZACHARIAS \VILLIAMS DAlV. 

